Question

Show how free energy change determines whether a chemical reaction will be spontaneous or not

Answer 1

When using Gibbs free energy to determine the spontaneity of a process, we are only concerned with changes in \text GG, rather than its absolute value. The change in Gibbs free energy for a process is thus written as \Delta \text GΔG, which is the difference between \text G_{\text{final}}Gfinal​, the Gibbs free energy of the products, and \text{G}_{\text{initial}}Ginitial​, the Gibbs free energy of the reactants.